/* =========================================================
   style.css —— 只给名词卡片页用
   公共部分（颜色变量、页头页脚、.wrap）来自 ../assets/style.css
   ========================================================= */

/* ---------- 搜索框 ---------- */
.search-bar {
  margin: 20px 0;
}

.search-bar input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  outline: none;
}

.search-bar input:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(47, 158, 111, .12);
}

/* ---------- 卡片网格 ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

/* ---------- 单张卡片 ---------- */
.card {
  perspective: 900px;
  height: 220px;
  cursor: pointer;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform .5s ease;
  transform-style: preserve-3d;
}

.card.flipped .card-inner {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  padding: 16px;
  display: flex;
  flex-direction: column;
}

/* ---------- 正面 ---------- */
.card-front {
  justify-content: center;
  text-align: center;
}

.card-front .term {
  font-size: 19px;
  font-weight: 700;
  color: var(--green-dark);
  margin-bottom: 8px;
}

.card-front .short {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.card-front .hint {
  margin-top: auto;
  font-size: 11px;
  color: var(--muted);
  opacity: .7;
}

/* ---------- 背面 ---------- */
.card-back {
  transform: rotateY(180deg);
  overflow-y: auto;
}

.card-back .term {
  font-size: 16px;
  font-weight: 700;
  color: var(--green-dark);
  margin-bottom: 8px;
}

.card-back .field {
  margin-bottom: 8px;
  font-size: 12px;
  line-height: 1.55;
}

.card-back .label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 2px;
}

.card-back .trap {
  color: #a15c2a;
}

.card-back .trap .label {
  color: #a15c2a;
}

/* ---------- 搜索无结果提示 ---------- */
.empty-tip {
  display: none;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  padding: 24px 0;
}

/* ---------- 小屏：两列小卡 ---------- */
@media (max-width: 560px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .card {
    height: 200px;
  }

  .card-front .term {
    font-size: 16px;
  }

  .card-front .short {
    font-size: 12px;
  }

  .card-back {
    padding: 12px;
  }

  .card-back .field {
    font-size: 11px;
  }
}